Like, the only thing I can think of that would cause this is, while I don't know much about salt water, in freshwater aquariums you typically have two different bacterial species, one turns ammonia into nitrite, one turns nitrite into nitrate. with my ammonia low and nitrite high, it seems to me like some of the bacteria from before might not have taken, or not taken as well as the other, and its not possible to overdose bacteria, so that's where my logic is. I do have some, because I do have significant nitrate, but They clearly need some helpSounds good. Good call on the dr tims